Production of the ω meson in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>p</mml:mi><mml:mi>d</mml:mi><mml:mo>→</mml:mo></mml:mrow><mml:mmultiscripts><mml:mi mathvariant="normal">He</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:mmultiscripts><mml:mrow><mml:mi>ω</mml:mi></mml:mrow></mml:math>reaction at 1450 MeV and 1360 MeV

Schönning, K.; Bargholtz, Chr.; Bashkanov, M.; Berłowski, M.; Bogoslawsky, D.; Calén, H.; Clement, H.; Demiroers, L.; Ekström, C.; Fransson, K.; Gerén, L.; Gustafsson, L.; Höistad, B.; Ivanov, G.; Jacewicz, M.; Jiganov, E.; Johansson, T.; Keleta, S.; Khakimova, O.; Khemchandani, P; Kren, F.; Kullander, S.; Kupść, A.; Kuzmin, A.; Lindberg, K.; Marciniewski, P.; Morosov, B.; Oelert, W.; Pauly, C.; Petrén, H.; Petukhov, Y.; Povtorejko, A.; Ruber, Roger; Scobel, W.; Shafigullin, R.; Shwartz, B.; Skorodko, T.; Sopov,; Steṕaniak, J.; Tegnér, P. E.; Engblom, P. Thörngren; Tikhomirov,; Turowiecki, A.; Wagner, Jan; Wilkin, C.; Wolke, M.; Zabierowski, J.; Zartova, I.; Złomańczuk, J.

doi:10.1103/physrevc.79.044002

Cited by 6 publications

(3 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The authors found the one-and two-body mechanisms to contribute 2-3 orders of magnitude lesser than the three-body mechanism and produced backward peaked angular distributions (consistent with the findings of [58]). Similar problems in reproducing the angular distributions for the p d → 3 He ω reaction also have been reported in Refs [118,119]. A comparison of the one and two step processes in the 12 C(p, η) 13 N reaction can be found in [120].…”

Section: One Two and Three Body Mechanismssupporting

confidence: 74%

Interaction of eta mesons with nuclei

et al. 2013

View full text Add to dashboard Cite

Back in the mid-1980s, a new branch of investigation related to the interaction of eta mesons with nuclei came into existence. It started with the theoretical prediction of possible exotic states of eta mesons and nuclei bound by the strong interaction and later developed into an extensive experimental program to search for such unstable states as well as understand the underlying interaction via eta-meson producing reactions. The vast literature of experimental as well as theoretical works that studied various aspects of eta-producing reactions such as the π(+)n → ηp, pd → (3)Heη, p (6)Li → (7)Be η and γ (3)He → η X, to name a few, had but one objective in mind: to understand the eta-nucleon (ηN) and hence the η-nucleus interaction which could explain the production data and confirm the existence of some η-mesic nuclei. In spite of these efforts, there remain uncertainties in the knowledge of the ηN and hence the η-nucleus interaction. Therefore, this review is an attempt to bind together the findings in these works and draw some global and specific conclusions which can be useful for future explorations.The ηN scattering length (which represents the strength of the η-nucleon interaction) using different theoretical models and analyzing the data on η production in pion, photon and proton induced reactions was found to be spread out in a wide range, namely, 0.18 ≤ Re aηN ≤ 1.03 fm and 0.16 ≤ Rm aηN ≤ 0.49 fm. Theoretical searches of heavy η-mesic nuclei based on η-nucleus optical potentials and lighter ones based on Faddeev type few-body approaches predict the existence of several quasibound and resonant states. Although some hints of η-mesic states such as (3)(η)He and (25)(η)Mg do exist from previous experiments, the promise of clearer signals for the existence of η-mesic nuclei lies in the experiments to be performed at the J-PARC, MAMI and COSY facilities in the near future. This review is aimed at giving an overall status of these efforts.

show abstract

Section: One Two and Three Body Mechanismssupporting

confidence: 74%

Interaction of eta mesons with nuclei

et al. 2013

View full text Add to dashboard Cite

show abstract

“…To state a few examples, these resonances play an important role in understanding N − N interaction [1, 2], in describing cross sections for the reaction with meson-nucleus final states (for instance, see Refs. [3][4][5][6]), in approaching some fundamental issues, like, existence of multiquark states [7], occurrence of OZI violating processes [8], etc. Such relevance serves as a motivation for the dedicated efforts made by several groups in extracting information related to N * and ∆ resonances through different approaches: like, partial wave analysis of the relevant data [9], within quark models [10], unitarized dynamical models (see, for example, Refs.…”

Section: Introductionmentioning

confidence: 99%

Role of vector and pseudoscalar mesons in understanding1/2−N*andΔresonances

et al. 2013

Self Cite

View full text Add to dashboard Cite

A study of nonstrange meson-baryon systems has been made with the idea of understanding the properties of the low-lying 1/2 − N * and ∆ resonances. The coupled channels are built by considering the pseudoscalar and vector mesons together with the octet baryons. The formalism is based on obtaining the interactions from the lowest order chiral Lagrangian when dealing with pseudoscalar mesons and relying on the hidden local symmetry in case of the vector mesons. The transition between the two systems is obtained by replacing the photon by a vector meson in the Kroll-Ruderman theorem for the photoproduction of pseudoscalar mesons. The subtraction constants, required to calculate the loop-function in the scattering equations, are constrained by fitting the available experimental data on some of the reactions with pseudoscalar meson-baryon final states. As a consequence, we find resonances which can be related to N * (1535), N * (1650) (with a double pole structure), N * (1895) and ∆(1620). We conclude that these resonances can be, at least partly, interpreted as dynamically generated resonances and that the vector mesons play an important role in determining the dynamical origin of the low-lying N * and ∆ states. a kanchan@if.usp.br

show abstract

“…The normalisation was achieved by comparing data on backward going η mesons from pd → 3 Heη from SPES IV [11] and SPES III [12] with the corresponding data from this work using the method described in Refs. [23] and [25]. The normalisation uncertainty of the measured cross sections and is 29% at 1360 MeV and 12% at 1450 MeV.…”

Section: The η Angular Distributionmentioning

confidence: 99%